<%@page import="java.sql.*" %>
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>整表查询数据</title>
    <%! ResultSet rs; //数据库查询结果集%>
<%
String dbName = "school";//数据库
    String userName ="root";//账户
    String userPassword ="qwert";//密码
    String url ="jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPassword;
    Class.forName("com.mysql.cj.jdbc.Driver");//5.7以下不加.cj
    Connection conn = DriverManager.getConnection(url);//连接数据库
    Statement statement = conn.createStatement();//创建操作对象
    String sql = "select * from student";//查询学生表所有字段
    rs = statement.executeQuery(sql);//运行sql命令查询数据 结果放到rs结果集中
%>
</head>
<body>
<form action="first.jsp" method="post">
    <table>
        <th colspan="2">查询条件</th>
        <tr>
            <td>学号：</td>
            <td>
                <input type="text" name="stuid" id="stuid">
            </td>
        </tr>
        <tr aria-rowspan="2">
            <td><input type="submit" value="提交"></td>
        </tr>
    </table>
</form>
<table border="1">
<th colspan="4" style="font-size:x-large;alignment:center">学生信息表</th>
    <tr style="text-align:center">
    <td>学号</td>
    <td>姓名</td>
    <td>出生日期</td>
    <td>所在班级</td>
    </tr>
    <% while (rs.next()){%>
    <tr style="text-align:center">
        <td><%=rs.getString(1)%></td>
        <td><%=rs.getString(2)%></td>
        <td><%=rs.getString(3)%></td>
        <td><%=rs.getString(4)%></td>
    </tr>
    <% } %>
</table>
<%--关闭数据库连接--%>
<%
rs.close();
statement.close();
conn.close();
%>
</body>
</html>